fix markup typo, duh

docs/components.html

@@ -1259,9 +1259,9 @@ <h4>Overflowing content</h4>
     <p>Since Bootstrap doesn't know how much space the content in your navbar needs, you might run into issues with content wrapping into a second row. To resolve this, you can:</p>
     <ol type="a">
       <li>Reduce the amount or width of navbar items.</li>
-      <li>Hide certain navbar items on certain screen sizes using <a href="../css/#responsive-utilities">responsive utility classes</a>.
+      <li>Hide certain navbar items on certain screen sizes using <a href="../css/#responsive-utilities">responsive utility classes</a>.</li>
       <li>Change the point at which your navbar switches between collapsed and horizontal mode. Customize the <code>@grid-float-breakpoint</code> variable or add your own media query.</li>
-    </li>
+    </ol>
   </div>
   <div class="bs-callout bs-callout-danger">
     <h4>Requires JavaScript</h4>